Also, historically, there was a frontier that they could just be shipped off to. Typically the frontier was a much rougher place where there was decent odds the

Also, historically, there was a frontier that they could just be shipped off to. Typically the frontier was a much rougher place where there was decent odds they'd succumb to illness or the elements. And if that didn't happen, practitioners of frontier justice were not as hung up on questions of ethics and rehabilitation.